Effect of Aluminum Plant Waste Slag on the Melting Characteristics of Gasification Briquette with Low Ash Fusion Temperature
LIN Hua-feng LIN Rong-ying LIN Bo ZHENG Fu-bao
Institute of Chemical Engineering and Technology, Fuzhou University Institute of Chemical Engineering and Technology, Fuzhou University Institute of Chemical Engineering and Technology, Fuzhou University Institute of Chemical Engineering and Technology, Fuzhou University
Abstract：The effect of aluminum plant waste slag on the melting characteristic of Fujian Jianxing coal (JX), Yongan coal and Chuanghong coal with low ash fusion temperature was studied under the mild reducing atmosphere. The change of mineral compositions under various temperatures before and after addition of the waste slag into JX was examined by XRD and SEM-EDX. The results show that low-temperature eutectic mixtures formed over 1000℃ is the major reason for low ash fusion temperature of JX. The coal ash fusion temperature is obviously increased by adding the waste slag .While the added mass of waste slag is 6% (ash as reference), the ash softening temperature (ST) of JX can be increased to over 1250℃ to meet the ash fusion temperature requirements of the gasifier solid deslagging process. Adding the waste slag, mullite phase forms in JX ash above 1000℃. The mullite phase plays a skeleton effect on ash, and delays the formation of low-temperature eutectic mixtures, thereby improving the ash melting point.
林华锋 林荣英 林博 郑福宝. 铝厂污泥对低灰熔点气化型煤熔融特性的影响规律[J]. , 2013, 13(2): 241-245.
LIN Hua-feng LIN Rong-ying LIN Bo ZHENG Fu-bao. Effect of Aluminum Plant Waste Slag on the Melting Characteristics of Gasification Briquette with Low Ash Fusion Temperature. , 2013, 13(2): 241-245.
2013, Vol. 13 
